Hiking in Hong Kong

I do a lot of walking in Hong Kong -- mostly in crowded and congested urban commercial districts. Today I took the advice of many Hong Kongers and explored one of the mountain hiking trails. The most well-known is the MacLehose Trail that runs 100 kilometers over some beautiful and rugged terrain. I traversed the stage one segment (10.6 kilometers) which runs alongside a huge reservoir to the ocean.



According to what I read this is an unusual rock formation -- hexagonal vertical rhyolite columns -- that is unique to these islands and the product of volcanic activity.



These concrete blocks in an interesting shape are "dolosse" used to protect the dam and reservoir channel from ocean waves.